Using Java to render objects

Hello everyone,

I want to use the sdk for an augmented reality project so I want to know how some things are done maybe someone can help me trough.

For the models I want to render I use a Java library to parse from a certain file format. This file will be somewhere on the internet just like the trackables will be. Since I'm not very familiar to cpp I want to use Java to render the models.

Later I want to use the virtual buttons to trigger some animations from the model. But for now I like to know how to get started with rendering a simple cube on a trackable.

For my project I use some code from a good tutorial written by Per-Erik Bergman http://blog.uncle.se/.

private Mesh root;

private AssetManager assetMgr;

public OpenGLRenderer(MainActivity mainActivity) {

Group group = new Group();

Mesh mesh = new Mesh();

short[] indices = {0, 4, 5, 

0, 5, 1, 

1, 5, 6,

1, 6, 2,

2, 6, 7,

2, 7, 3,

3, 7, 4,

3, 4, 0,

4, 7, 6,

4, 6, 5,

3, 0, 1,

3, 1, 2,};

float[] vertices = {-1, -1, -1, // 0

1, -1, -1, // 1

1, 1, -1, // 2

-1, 1, -1, // 3

-1, -1, 1, // 4

1, -1, 1, // 5

1, 1, 1, // 6

-1, 1, 1, // 7};

mesh.setVertices(vertices);

mesh.setIndices(indices);

group.add(mesh);

root = group;

}

publicvoid onSurfaceCreated(GL10 gl, EGLConfig config) {

gl.glClearColor(0.224f, 0.224f, 0.224f, 0.0f);

gl.glShadeModel(GL10.GL_SMOOTH);

gl.glClearDepthf(1.0f);

gl.glEnable(GL10.GL_DEPTH_TEST);

gl.glDepthFunc(GL10.GL_LEQUAL);

gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_NICEST);

}

publicvoid onDrawFrame(GL10 gl) {

gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);

gl.glLoadIdentity();

gl.glTranslatef(0, 0, -4);

root.draw(gl); 

}

publicvoid onSurfaceChanged(GL10 gl, int width, int height) {

gl.glViewport(0, 0, width, height);

gl.glMatrixMode(GL10.GL_PROJECTION);

gl.glLoadIdentity();

GLU.gluPerspective(gl, 45.0f, (float) width / (float) height, 0.1f, 100.0f);

gl.glMatrixMode(GL10.GL_MODELVIEW);

gl.glLoadIdentity();

}

}

How do I get this cude rendered on the trackable? What cpp files and methods do I need to use to get this done if whe take the basic ImageTargets example? Can some one explain this to me? I think that I am not the only one who wants to know this.

Thanks in advance.